Type-writing machine.



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JOHN G. McLAUGHLIN, OF JERSEY OITY, NEW JERSEY, ASSIGNOR TO UNDERWOOD TYPE- WRITER lOMlAXY, OF NEW YORK, N.'Y., A CORPORATION OF NEW JERSEY.

'1' YPE-WRITING MACHINE No. esasss.

Specification of Letters Patent.

Patented June 2, 1908.

To all whom it may concern:

Be it known that I, John C. MoLAUeHLIN, a citizen of the United States, residing in Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Type- Writing Machines, of which the following is a specification. i

This invention relates to special paperfeeding devices of typewriting machines, such as shown in United States Patent No. 819,785, and in the pending application of Harry S. McCormack, No. 371,377, filed May 2, 1907, designed to facilitate the writing of bills and simultaneously recording them, in a manner commonly known as condensed charging.

The principalobiect of my invention is to provide improved, simplified and easily operated means for producing spaces between the successive charges or entries upon the carbon record sheet, which as usual remains in the machine while successive bills are introduced, written and removed.

My invention is shown as applied to a mechanism such as is disclosed in said application, in which a crank is mounted upon the platen frame, butis normally out of engagement with the platen, a single swinging movement of the crank serving to rotate the platen. The crank in said application is mounted loosely upon the platen axle, and a pawl or dog is pivoted upon the crank in position to engage a notched or toothed wheel, the latter being fixed to the platen; a spring normally holding the pawl out of engagement with the notched wheel. A single movement of the crank throws the pawl into engagement with the notched wheel, such engagement being mechanically maintained.

until the crank is swung back to normal position, whereupon the s ring throws the awl out of engagement witi the toothed w ice], and also serves to hold the crank in its normal position.

According to my present invention, the crank-operated dog is caused to skip one or more notches or teeth of the wheel during the initial portion of the initial stroke of the crank (or other finger piece) and then to engage said wheel to turn it around, so that the platen is turned backwardly during the remainder of said stroke of the crank. The engagement of the dog with said wheel is also maintained during the entire return move- ,as turning the platen.

ment of the crank to normal position, so that the forward rotation of the platen effected by said wheel, is greater than the backward rotation thereof. Thus the platenis caused to turn backward a relatively short distance to receive a bill, and then forw'ardlv a relatively long distance to bring the bill to printing osition; and in this manner a space is left between the carbon records on the long record sheet, which isretained in the machine during the writing of successive bills, as understood in this art. That is to say, the record sheet is turned back with the platen through a certain arc to the point where a new bill is introduced, and is then turned forward with the platen through a greater arc, so that the record of the new bill is separated by a space on the record sheet from the record of the immediately preceding bill. It is only necessary for the operator to manipulate the crank to and fro in order to produce the required spacing between record entries, and hence confusion and mistakes are avoided, and the operation is much simplified.

In the accompanying drawings, Figure 1 is a perspective view, partly broken away, of a latch mechanism which causes one stroke of the platen to be shorter than the other stroke thereof. Fig. 2 is a part sectional plan of the right-hand end of the platen frame and appurtenances of an Underwood typewriting machine, showing my improvements. 3 is an end elevation of the special platenrotating mechanism, the crank being shown Fig. 4 shows a portion of the usual Underwood line-spacing mechanism at the left hand end of the frame. Fig. 5'is a perspective view of the crank and a pawl pivoted thereto. Fig. 3, but showing the crank in normal position, disconnected from the platen.

The usual cylindrical platen 1 of an Underwoodtypewriting machine is fixed upon an axle 2- journaled in the ends 3, of a platen frame 5, the end of 'the axle projecting through the platen frame end and having a finger-Wheel 6 thereon by means of which the platen may'be rotated forwardly or backwardly to an unlimited extent. The platen is also provided with the usual line-spacing devices, of which a toothed linespace wheel 7 and a yielding detent S therefor are seen at Fig. 4. Said line-space wheel is advanced intermittently by a pawl and lever, (not Fig.

Fig. 6 is a view like wardly, the pin 21 I cess 23, and thereafter'runs upon or within shown)".

notches 15 agreeing in number wit outer end of the sleeve '10.:

I said teeth. Said-- which is normally pressed 1 a recess 23 formed .in a motion ess disk-like Upon the end ofthe platen axle. is hub or sleeve 10, upon. which is secureda wheel 14 havin teeth or the teeth secured a rigidly on the lines ace wheel 7.. j

The whee 14'is rotatable by. means ol' a pawl 16 having a dog 1-7 to engage the teeth 15 of the wheel, but

normally disengaged therefrom, as seen atFig. 6, to permit indee pendent rotation of the wheel '14. and the platen 1. Saidpawl is pivoted at, 18 to ,a crank 19 havinga hub 20 to :fitupon the In order ,to effect backward rotation of the platen, the crank is swung from'itsnormal rear osition at Fig. 6"forwardly as at Fig. 3-, the first portion of the "movement-of I the crankcausing the tooth 17 of the pawl to pass idly by one, two or three teeth of wheel 14, and then to move into engagement with pawl carries vva pin 21, by a s ring-22 into member 24 mounted upon the outer portion ofthe sleeve 10.

moves down out of the re' an annular guiding wall 25 formed in the face of the member 24.09110611121'10 with .the

platen axle 2, said" well acting to confine the pawl so that its dog 17 cannot escape from the, wheel 14,'and hence the platen must ro-' -is alsopivoted upon thesleeve l0.-

tat'e backwardly and forwardly with the crank 19, which is provided with a handle 26-.'

The movements of the crank arel imited' by a stop 27 mounted upon an arm 28 which The stop is provided with a releasable pin 30 to engage any of a series ofholes 31 formed in the memdownwardly.

' that the latter I terminal portion .Thestop 27*,having ber 24-, the latter bein prevented from rotating by means of a lin the member24 andat '34tothe platen frame.

been set to 'the reguired position, as at Figs. 3 and 6, the hanle 26 is grasped by the operator to swing the same towards the front of the carriageand 19 forces the pawl to engage the Wheel 14, so and theplaten 'are caused to rotate with the the platen backwardly to receive a new bill,

this motionof the tion, the pin or projection 21 riding in con'--' tact 'With the guiding wall: 25, which keeps e the pawl 16 locked to the wheel 14. At t of ,the retur'n stroke ofthe crank,the pin 21 is engaged by spring 22 andv snapped up into the recess 23, 'thereby'releasingthe wheel 14 and also arresting,the

er j It will be observed that the re'cess23'is elongated and extends around thefdisk-Inem When the crank starts for the latter during the entire return latter havingan abutment I the recess '23 behind said latch35, and hence thedog skips several'of'the teeth or notches 15of the wheel 14. When the pin 21 reaches the'leading or forward portion of said recess, it encounters a cam or slo ing portion 38 formed in the member 24, w iich, during the continued movement of the crank 19, forces the pin down out of said recess 23, said pin moving aside the' latch 35, as, seen in dotted lines at Fig. 3, and the dog 17 entering one 01 the notches 15 of the wheel 14 the crank, dog, wheel and platen rotate until the crank is arrested by the stop 27. Upon the return stroke of the crank, the pin. 21 .rides along the forward latch 35, which forms substantially a .continuation of the circular guiding wall 25, and hence the dog 17 is maintained in engagement with the wheel 14 and continues to turn stroke of the crank 19. Then the spring 22, which is :in the path of the pin 21, snaps the latter up past the pivot end 36 of the latch 35, into the rear or lower end of the recess 23, the I ofproper i'orin Owing to the idleini-tial whereupon to arrest the crank.

or under side of said movement at the initial stroke of the crank 19, the "first stroke of the, wheel and platen is rendered shorter than the second stroke thereof, andfor this reason the record or car- 32 attached at 33 .to-

The movement of the crank crank in a direction to turn.

bon sheet, which is rolled around the platen, is-advanced sufficiently to produce a blank s ace upon the records. of successive bills at ereon. Thus it will. be seen, single mechanism,

the operator needs only to grasp the crank, and swing it in'a single direction about the platenv axis 2, automatically effecting the locking of the crank to the platen, and maintaining such lock connection until the crank is swung back again as far as it will go, Where,-

that by a 7 upon tllBQ'iISt line of writing may be begun platencontinuing until the crank 19 is arrested bythe stop 27. Upon upon the bill, without attention from the operator to the matter of properly separating the records on the record sheet.

' Variations may be resorted to Within the scope of the invention: I

I Having 'thus described my invention, I

' claim mally disengaged from the wheel, a pin upon provision is made whereby about thefaxis of said-notched said dog, a circular guiding wall for engagingsaid pin to retain said dog in engagement with said notched wheel, said wall provided with an elongated recess, a latch covering the leading portion of said recess, and means to cause the pin to entersaid recess back of said latch; said latch l'ieing releasable by a forward movement oi said crank,

2. in a typewriting machine, the combina- 19 tion with a revoluble platen anda notched wheel connected thereto, of a crank mounted to swing about the axis of said notched wheel; a dog carried by said crank for engaging with said notched WllGi,'Sfi,l(l dog nor- 5 Inally disengaged from the wheel, a pin upon said dog, a circular guiding wall for engaging said pin. to retain said dog in engagement with said notched wheel,said wall provided with an elongated recess, a latch covering the 20 leading portion of said. recess, and means to cause the pin to enter said recess back of said latch; the recess being formed with' a cam portion to enable the crank in its initialmovement to force said pin to force aside said latch and engage the dog withanotch of the wheel. I I

3. In a typewriting machine, the combination with a revoluble platen and a notched wheel connected thcretayof a crank mounted to swing about the axis of said notched'wheel, a dog carried by said crank for engaging with said notched wheel, said dog normally disengaged from the wheel, a pin or projection upon said dog, a fixed disk having a circular guiding wall for engaging said pin to retain saiddo in engagement with said notched wheel, sair wall provided with an elongated recess, a latch pivoted to said disk and normally caused by a spring to close the leading end of said ge- 40 cess, said latch forming a substantial continuation of said circular guiding wall, and a spring provided upon said. disk in the path of said pin to force the latter during the return movement of said crank to enter said-recess back of said latch; the recess provided at its leading end with a cam to cause the pin to force thelatch aside and engage the dog with a notch of the wheel.

4. In a typewritin machine, the combination with a reVolubIe platen, of a notched wheel connected thereto, a crank movable about the axis of said notched wheel, a dog mounted upon said crank, means limiting the reciprocation of the crank, means to engagethe, dog with one of the notches of the wheel,

means to maintain the dog in operative engagement with said notch during both forward and backward throws of the crank, and a latch-device for ca'using thc dogto remain so longer in said notch at the return stroke than at the first" stroke of the crank, to effect a substantially greater throw of the wheel and platen ;durin,;the return stroke than during the first stro .e of the crank; 5. In a typewriting machine, the combination with a'revoluble platen, of a notched wheel 'connected thereto, a crank movable about the axis of said notched wheel, a dog mounted upon said crank, means limiting the reciprocation oi the crank, means to'engage the dogwith one of the notches ol' the wheel, means to maintain the dog in operative engagement with said notch while the crank is reciprocated, and a latch device for causing the dog to skip one or more notches or teeth of the wheel at the initial portion of the initial stroke of the crank, to render the back ward rotationot' the platen correspimdingly shorter than the forward rotation thereof,

6. In a typewriting machine, the combinationwith a revoluble platen, of a notched wheel connected thereto, a crank movable about the axis of said notched wheeha dog operable by said crank and movable into and out of engagement with said notched wheel, and means including a latch mechanism for enabling said crank, dog and notched wheel to cooperate to effect at each complete reciprocation of the crank fromand to its normal position, a short backward stroke of the platentoreceive a sheet, and a longer forward stroke of the platen to bring the sheet to printing position.

5 7. In a typewriting machine, the combination with a revoluble platen and a notched wheel connected thereto, of a crank mounted to swing about the axis of said notched wheel, a dog carried by said crank for engaging with said notched wheel, said dog normally disengaged from the wheel, a pin upon 10 said dog, a circular guiding wall for engaging said pin to retain said dog in engagement with said notched wheel, said wall provided with an elongated recess, a latch pivoted at one end and at its other end caused by a 1 5 spring to close said recess, said latch forming a substantial continuation of said guiding wall, and a gap being left between the pivotend of said latch and the other end of saidrecess, and a spring to cause the in to, 11 enter said gap and to travel behind sai latch during the initial portion of the initial stroke of tl1e crank;'the recess being provided at its closed end with means to cause the pin to force aside the latch and the dogto engage a notch of the wheel.

8. In a typewriting machine, the combination with a revoluble platen and a notched wheel connected thereto, of a crank having a limited movement and mounted to turn about the axis of said wheel, a dog normally discngagedfrom the wheel, means for enabling the crank by a single movement tocarry the dog idly around past a number of notches of the wheel and then to'engage the dog (with the wheel, means to maintain the dog in such engagement during the remain-- der of the first stroke of the crank'and during the entire return stroke of the crank, and means to disengage the dog from the wheel the crank.

ing said pin to retain upon the completion of said return stroke of 9. In atypewriting machine, the 'con1bina tion with a revoluble platen and a notched v wheel connected thereto, of a crank mounted to swing about the axis of said notched Wheel, apawl pivoted upon said crank for engaging with said notched wheel, and noimally disengaged from the wheel, a pin upon said pawl, acircular guiding wall for engagsaidpawl in engagement with said notched-wheel, said wall pro vided with an elongated recess, a'latch pivoted-at one end and at its other end caused said recess, said latch l I by a spring to close tinuation of said the pivot end of said latch and the other end of said recess, and a spring tocause the p to enter said Igap andto he initial p latch durin vided at its to engage a notch of 'the wheel.

' Witnesses:

JOHN C. MOLAUGHLIN.

JOHN O. SEIFERT,

v Ki'r'rrn FRANKmmT,

travel behind said ortion of the initial stroke of-tlie crank; the recess bein closed end the pawl g p q- 7 with means to cause the pin to force aside the latch and 

